Looking for a couple starting pitchers to pick up. I have Felix, Beckett, Darvish, and Hudson. Seems like none of them are getting it done lately.

Looking at the past 30 days, 14 days, and 7 days, here are some of the top names available. Any suggestions or comments? Also, I will be hanging on to Felix and Darvish, but what do you think about dropping Beckett or Hudson?